is a municipality in southwest Sweden
, in the county of Västra Götaland
. The municipality covers an area of 641.8 km²
. Of the total population of 36589, 18154 are male, and 18435 are female. The population density
of the community is 57 inhabitants per km².
The poet Birger Sjöberg (1885-1929) was born in Vänersborg.